I have to say that my first thought was "why?" Closely followed by "for who?" It seems to be another one of Google's 'lets take over the world one app at a time' ideas, no real thought has gone into who would want this and why they would use it. It just seems that Google is showing off it's technical ability with a 'look what we did' kind of attitude. If they could put 5% of that drive and determination into some research to see what people really wanted it would be amazing!